Degree of Conversion and Mechanical Properties of a Commercial Composite with an Advanced Polymerization System

MC Tapety, Celiane; KP Carneiro, Yvina; M Chagas, Yarina; C Souza, Lidiane; de O Souza, Nayara; AR Valadas, Lidia

doi:10.54589/aol.36/2/112

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…Hence, flexural resistance and hardness are two of the most studied mechanical attributes because they closely resemble the forces generated during mastication and those supported by the material [28]. The hardness of RBCs is typically linked with the degree of conversion, which in turn depends on polymerization conditions and composite substances (type and quantity) [29,30]. It determines the material's abrasion resistance, indirectly influencing bacterial adhesion by making surfaces more easily roughened [16,17].…”

Section: Introductionmentioning

confidence: 99%

Physical-Chemical and Microhardness Properties of Model Dental Composites Containing 1,2-Bismethacrylate-3-eugenyl Propane Monomer

Al-Odayni,

Al-Kahtani,

Sharaf Saeed

et al. 2023

Biomimetics

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A new eugenyl dimethacrylated monomer (symbolled BisMEP) has recently been synthesized. It showed promising viscosity and polymerizability as resin for dental composite. As a new monomer, BisMEP must be assessed further; thus, various physical, chemical, and mechanical properties have to be investigated. In this work, the aim was to investigate the potential use of BisMEP in place of the BisGMA matrix of resin-based composites (RBCs), totally or partially. Therefore, a list of model composites (CEa0, CEa25, CEa50, and CEa100) were prepared, which made up of 66 wt% synthesized silica fillers and 34 wt% organic matrices (BisGMA and TEGDMA; 1:1 wt/wt), while the novel BisMEP monomer has replaced the BisGMA content as 0.0, 25, 50, and 100 wt%, respectively. The RBCs were analyzed for their degree of conversion (DC)-based depth of cure at 1 and 2 mm thickness (DC1 and DC2), Vickers hardness (HV), water uptake (WSP), and water solubility (WSL) properties. Data were statistically analyzed using IBM SPSS v21, and the significance level was taken as p < 0.05. The results revealed no significant differences (p > 0.05) in the DC at 1 and 2 mm depth for the same composite. No significant differences in the DC between CEa0, CEa25, and CEa50; however, the difference becomes substantial (p < 0.05) with CEa100, suggesting possible incorporation of BisMEP at low dosage. Furthermore, DC1 for CEa0–CEa50 and DC2 for CEa0–CEa25 were found to be above the proposed minimum limit DC of 55%. Statistical analysis of the HV data showed no significant difference between CEa0, CEa25, and CEa50, while the difference became statistically significant after totally replacing BisGMA with BisMEP (CEa100). Notably, no significant differences in the WSP of various composites were detected. Likewise, WSL tests revealed no significant differences between such composites. These results suggest the possible usage of BisMEP in a mixture with BisGMA with no significant adverse effect on the DC, HV, WSP, and degradation (WSL).

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Section: Introductionmentioning

confidence: 99%

Physical-Chemical and Microhardness Properties of Model Dental Composites Containing 1,2-Bismethacrylate-3-eugenyl Propane Monomer

Al-Odayni,

Al-Kahtani,

Sharaf Saeed

et al. 2023

Biomimetics

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Color evaluation of a one-shade used for restoration of non-carious cervical lesions: an equivalence randomized clinical trial

Favoreto,

de Oliveira de Miranda,

Matos

et al. 2024

BMC Oral Health

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Background Obtaining a perfect color match with resin composite presents a significant challenge. The chameleon effect has enabled resin composite to mimic the color of the adjacent tooth structure in vitro. This double-blind, split-mouth and equivalent randomized clinical trial evaluated the color matching of one-shade resin composite with chameleon effect versus multi-shade resin composite in non-carious cervical lesion restorations (NCCLs). Methods One hundred twenty restorations were performed on NCCLs with two restorative materials ( n = 60). After prophylaxis, the teeth were isolated with rubber dam and one universal adhesive was applied in the selective enamel etching strategy. For both groups, the restorations were inserted incrementally. The values of ΔE ab and ΔE 00 in the cervical and middle third were evaluated using a digital spectrophotometer before vs. after the restorations. The restorations were evaluated at baseline and after 7 days, 6-, 12- and 18-month of clinical performance according to the FDI criteria (Word Federation Criteria). Statistical analysis was performed using Chi-square test for all parameters. Color change was analyzed by two one-sided t-tests for paired samples (α = 0.05). Results Regarding the color measurement no significant difference was observed when Vittra APS (FGM Dental Products, Joinville, SC, Brazil) was compared to Vittra Unique (FGM Dental Products, Joinville, SC, Brazil) for any of the comparisons performed ( p > 0.05). However, the ΔE ab and ΔE 00 values for the cervical third, both before and after the restorations, were higher compared to the ΔE ab and ΔE 00 values observed when comparing the cervical and middle thirds after the restorations. After 18 months, five restorations exhibited minimal discrepancies in terms of marginal adaptation or marginal discoloration ( p > 0.05). In all other criteria, including retention rate, no changes were detected at the 18-month recall. Conclusions The one-shade resin composite used achieve the same color match when compared to a multi-shade resin composite after a period of 7 days in NCCLs. Overall, the restorations scored clinically very good (FDI) at baseline and after 18 months for all outcomes. Clinical Significance The use of a one-shade resin composite in NCCLs can be recommended because it has the ability to simplify the restoration procedure and maintaining an excellent clinical performance. Registration of clinical trials RBR-8txr4fw: 26/05/2022. Supplementary Information The online version contains supplementary material available at 10.1186/s12903-024-05108-6.

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Degree of Conversion and Mechanical Properties of a Commercial Composite with an Advanced Polymerization System

Cited by 2 publications

References 16 publications

Physical-Chemical and Microhardness Properties of Model Dental Composites Containing 1,2-Bismethacrylate-3-eugenyl Propane Monomer

Physical-Chemical and Microhardness Properties of Model Dental Composites Containing 1,2-Bismethacrylate-3-eugenyl Propane Monomer

Color evaluation of a one-shade used for restoration of non-carious cervical lesions: an equivalence randomized clinical trial

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